I'm not able to put a number to that, but certainly we know that the advances we've seen—66% reduction in heart attacks, 50% reduction in stroke and amputation—are due to the application of evidence-based therapies. We also know that people with diabetes won't take those medications if they can't afford them.
As I mentioned, many of the things we treat in diabetes are asymptomatic risk factors, like high cholesterol. A person in this condition feels no different if they skip their medication. If they're forced to choose between feeding their family and buying their statins, they will feed their family. The long-term consequences are the personal cost of amputation, blindness, heart attack, and the system cost of caring for those complications.